英语翻译Inclined Tool Very often,ballnose cutters are being used

英语翻译
Inclined Tool
Very often,ballnose cutters are being used.In three-axis operation,ballnose cutters have the disadvantage that they are supposed to do part of their milling work with the tip,where the cutting speed is zero.For this reason,many machines offer the ability to incline the tool in one or two axes so that the tool always cuts with its side,thus warranting a nearly constant cutting speed.The compensation of the machine kinematics,as well as the tool offset in space within the CNC,permit the use of any tool orientation without affecting the part program.In this case,the control executes the same calculations as if the machine had five axes.Machines with five simultaneous axes allow machining of the part with a constant inclination of the tool,which is being kept constant in relation to the surface.Again,the control compensates for the tool dimensions for any type of tool and any inclination angle.The inclination angle can be set using the handwheel and the tool center point function.
If the part is strongly modeled--that is,exhibits surface areas of different average slopes--the control allows the machining of entire zones with a similar surface orientation using a certain inclination of the tool,and then change to a different zone with a different orientation.In order to define the zone,the operator can use the handwheel to move the tool to the boundaries and store them in the control with the teach-in function.Afterwards,the control takes the original part program and "filters out" only the portions of the surface within the zone.By the same token,repaired patches on the surface can be re-machined,and areas can be left unmachined if required.Up to three zones can be defined as "no entry" or "no exit" zones and combined logically.Instead of establishing the zones through teach-in,they can also be defined using points in space within a standard part program.This way,they can be generated directly on the CAD/CAM system.This function is particularly valuable on high speed machines,where idle time waiting for an altered part program can be saved.The zoning function allows an instantaneous change of the machining process without the need for a new part program.